EP3156358A1 - Automatische rettungs- und energiesparvorrichtung für aufzug und steuerungsverfahren dafür sowie superkondensatormodul - Google Patents

Automatische rettungs- und energiesparvorrichtung für aufzug und steuerungsverfahren dafür sowie superkondensatormodul Download PDF

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Publication number
EP3156358A1
EP3156358A1 EP15781010.2A EP15781010A EP3156358A1 EP 3156358 A1 EP3156358 A1 EP 3156358A1 EP 15781010 A EP15781010 A EP 15781010A EP 3156358 A1 EP3156358 A1 EP 3156358A1
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EP
European Patent Office
Prior art keywords
super
energy
capacitor module
lift
power
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP15781010.2A
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English (en)
French (fr)
Other versions
EP3156358A4 (de
Inventor
Eric Ka Wai Cheng
Eugene Yu Ching CHAN
Xiangdang Xue
Lok Yan Lorraine CHAN
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Forward Electronics Co Ltd
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Forward Electronics Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Priority claimed from CN201510484927.1A external-priority patent/CN105098967B/zh
Priority claimed from CN201520595650.5U external-priority patent/CN204928347U/zh
Application filed by Forward Electronics Co Ltd filed Critical Forward Electronics Co Ltd
Publication of EP3156358A1 publication Critical patent/EP3156358A1/de
Publication of EP3156358A4 publication Critical patent/EP3156358A4/de
Withdrawn legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
    • B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
    • B66B5/027—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions to permit passengers to leave an elevator car in case of failure, e.g. moving the car to a reference floor or unlocking the door
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B1/00—Control systems of elevators in general
    • B66B1/24—Control systems with regulation, i.e. with retroactive action, for influencing travelling speed, acceleration, or deceleration
    • B66B1/28—Control systems with regulation, i.e. with retroactive action, for influencing travelling speed, acceleration, or deceleration electrical
    • B66B1/30—Control systems with regulation, i.e. with retroactive action, for influencing travelling speed, acceleration, or deceleration electrical effective on driving gear, e.g. acting on power electronics, on inverter or rectifier controlled motor
    • B66B1/302—Control systems with regulation, i.e. with retroactive action, for influencing travelling speed, acceleration, or deceleration electrical effective on driving gear, e.g. acting on power electronics, on inverter or rectifier controlled motor for energy saving
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B1/00—Control systems of elevators in general
    • B66B1/24—Control systems with regulation, i.e. with retroactive action, for influencing travelling speed, acceleration, or deceleration
    • B66B1/28—Control systems with regulation, i.e. with retroactive action, for influencing travelling speed, acceleration, or deceleration electrical
    • B66B1/30—Control systems with regulation, i.e. with retroactive action, for influencing travelling speed, acceleration, or deceleration electrical effective on driving gear, e.g. acting on power electronics, on inverter or rectifier controlled motor
    • B66B1/308—Control systems with regulation, i.e. with retroactive action, for influencing travelling speed, acceleration, or deceleration electrical effective on driving gear, e.g. acting on power electronics, on inverter or rectifier controlled motor with AC powered elevator drive
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B1/00—Control systems of elevators in general
    • B66B1/24—Control systems with regulation, i.e. with retroactive action, for influencing travelling speed, acceleration, or deceleration
    • B66B1/28—Control systems with regulation, i.e. with retroactive action, for influencing travelling speed, acceleration, or deceleration electrical
    • B66B1/32—Control systems with regulation, i.e. with retroactive action, for influencing travelling speed, acceleration, or deceleration electrical effective on braking devices, e.g. acting on electrically controlled brakes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B1/00—Control systems of elevators in general
    • B66B1/34—Details, e.g. call counting devices, data transmission from car to control system, devices giving information to the control system
    • B66B1/3415—Control system configuration and the data transmission or communication within the control system
    • B66B1/3446—Data transmission or communication within the control system
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
    • B66B5/0006—Monitoring devices or performance analysers
    • B66B5/0018—Devices monitoring the operating condition of the elevator system
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
    • H02J7/0014—Circuits for equalisation of charge between batteries
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
    • H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
    • H02J9/062—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for AC powered loads
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
    • H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
    • H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
    • H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B2201/00—Aspects of control systems of elevators
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
    • H02J7/345—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering using capacitors as storage or buffering devices
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
    • Y04S20/20—End-user application control systems

Definitions

  • the present application relates to fault test and energy saving of lifts, and more particularly to a device for automatically rescuing a lift and saving energy and a method thereof, and a super-capacitor module.
  • the rechargeable battery is generally selected as the backup supply in the case of emergency. It should be pointed out that the rechargeable battery has the disadvantages, such as limited service lifetime, long charging time and small voltage range. Consequently, those have effect on stability and reliability of emergency stopping-at-right-floor-level devices.
  • the down motion under heavy load or up motion under light load results in changes in term of potential energy, and when the lift decelerates, a traction motor thereof may generate braking energy.
  • the braking energy may be fed back to a DC bus of an inverter through a motor and the inverter. Consequently, the voltage of the DC bus rises.
  • the voltage of the DC bus may not be over a limitation.
  • two approaches are used generally to release the feedback energy. The one is that the energy is dissipated based on the braking resistor and the other is that the feedback energy is output to the power grid via the inverter. Obviously, the former wastes the feedback energy and the latter recovers the feedback energy effectively.
  • the latter has no ignorable disadvantage that the power output to the power grid possesses more harmonics which results in pollution to the power grid.
  • the present application is to present a device for automatically rescuing a lift and saving energy and a method thereof based on a super-capacitor module, which can stably and reliably provide the backup supply for emergency stopping-at-right-floor-level of lifts and implement the energy-saving operation of lifts when power failure happens suddenly.
  • a device for automatically rescuing a lift and saving energy comprising: a super-capacitor module configured to store energy comprising backup energy for emergency stopping-at-right-floor-level of the lift and feedback energy generated by a traction motor during braking; a DC-DC converter connected to the super-capacitor module and a motor drive for driving the traction motor of the lift, and configured to convert a voltage level of the super-capacitor module into a voltage level of a DC bus of the motor drive, and further configured to convert the voltage level of the DC bus into the voltage level of the super-capacitor module; a DC-AC inverter connected to the DC-DC converter, and configured to convert DC power output from the DC-DC converter into AC power; a switch circuit connected to the DC-AC inverter and a power grid, and configured to select and switch between the DC-AC inverter and the power grid so as to output the converted AC power by the DC-AC inverter to a lift controller
  • the super-capacitor module comprises a plurality of branches connected in parallel, wherein each branch comprises a plurality of super-capacitor units connected in series, each of which comprises a super-capacitor and a balancing circuit connected in parallel with each other, and wherein the balancing circuit is used for maintaining normal operation of the super-capacitor connected in parallel with the balancing circuit in an allowable operation range.
  • the energy management system is further configured to control the DC-DC converter that enables the super-capacitor module to store the feedback energy generated by the traction motor during braking when the traction motor operates in a braking mode, and control the DC-DC converter that supplies the stored feedback energy to the traction motor when the traction motor is in a motoring mode.
  • the energy management system is further configured to: when the traction motor operates in the braking mode, if the energy of the super-capacitor module is less than an upper limit of the feedback energy during braking, control the DC-DC converter that transfers the feedback energy generated by the traction motor during braking to the super-capacitor module so as to store it; and otherwise, release the feedback energy generated by the traction motor during braking; wherein the upper limit of the feedback energy represents an allowable maximum capacity of the super-capacitor module.
  • the energy management system is further configured to, when the traction motor is in the motoring mode, determine whether the energy of the super-capacitor module is larger than a rescue energy required for rescuing the operation of the lift; transfer the feedback energy in the super-capacitor module to the motor drive if the energy of the super-capacitor module is larger than the rescue energy; and otherwise, control the DC-DC converter to stop operation thereof.
  • the energy management system is further configured to, when the traction motor operates in the motoring mode, determine whether to charge the super-capacitor module according to the energy capacity of the super-capacitor module, control the DC-DC converter connected to the super-capacitor module to charge the super-capacitor module if the energy of the super-capacitor module is less than the rescue energy required for rescuing the operation of the lift, and otherwise, stop the charging to the super-capacitor module.
  • the energy management system is further configured to, if the power from the power grid is unavailable, send an instruction to the lift controller, so as to force the lift to stop at the nearest floor by the lift controller.
  • the device for automatically rescuing a lift and saving energy further comprises a super-capacitor management system configured to monitor and manage operation of the super-capacitor module, and send corresponding fault information to the energy management system when finding there is a failure in the super-capacitor module.
  • the DC-DC converter is a multiple-phase bidirectional power converter composing of a plurality of phase circuits, each of which comprises an inductor and two power switches.
  • the DC-AC inverter comprises power switches, power diodes, an inductor, a capacitor, a driving circuit, and a control circuit.
  • the switch circuit comprises contactors or power switches and a driving circuit.
  • a method for automatically rescuing a lift and saving energy comprising: when power from a power grid is available, selecting a single-phase power from the power grid as AC supply of a lift controller, and controlling a DC-DC converter to charge a super-capacitor module connected therewith to a specified backup energy; and when the power from the power grid is unavailable, selecting energy stored in the super-capacitor module as a rescue energy for a traction motor and the lift controller.
  • the method when the power from the power grid is available, the method further comprising: determining whether to charge the super-capacitor module according to energy capacity of the super-capacitor module; if the energy of the super-capacitor module is less than the rescue energy required for rescuing the operation of the lift , control the DC-DC converter connected to the super-capacitor module to charge the super-capacitor module; and otherwise, stopping the charging to the super-capacitor module.
  • the method when the power from the power grid is unavailable, the method further comprises: sending a control signal to the DC-DC converter, a DC-AC inverter, and a switch circuit which are connected together one by one, so that the DC-DC converter transfers the energy stored in the super-capacitor module to the motor drive and the DC-AC inverter, and the switch circuit selects the output from the DC-AC inverter as the AC supply of the lift controller, thus forcing the lift to automatically stop at the nearest floor.
  • the method further comprises: when the traction motor operates in a braking mode, if the energy of the super-capacitor module is less than an upper limit of the braking feedback energy, controlling the DC-DC converter that transfers the feedback energy of the DC bus generated by the traction motor during braking to the super-capacitor module so as to store it; and otherwise, releasing the feedback energy generated by a traction motor during braking, wherein the upper limit of the feedback energy represents an allowable maximum capacity of the super-capacitor module.
  • the method further comprises: when the traction motor operates in the motoring mode, determining whether the energy in the super-capacitor module is larger than a rescue energy required for rescuing the operation of the lift; transferring the feedback energy in the super-capacitor module to the motor drive if the energy of the super-capacitor module is larger than rescue energy required for rescuing the operation of the lift; and otherwise, controlling the DC-DC converter to stop operation thereof.
  • a super-capacitor module which stores backup energy for emergency stopping-at-right-floor-level of the lift and feedback energy generated by a traction motor during braking; wherein the super-capacitor module comprises a plurality of branches connected in parallel, wherein each branch comprises a plurality of units connected in series, each of which comprises a super-capacitor and a balancing circuit connected in parallel with each other, and wherein the balancing circuit is used for maintaining operation of the super-capacitor connected in parallel with the balancing circuit in an allowable operation range.
  • the super-capacitor is a super-capacitor cell or is composed of a plurality of super-capacitor cells connected in parallel.
  • the present application provides the stable and reliable power supply for rescuing lifts by using the super-capacitor module when the power failure happens suddenly, stores the feedback energy generated during the lift braking, and reuses the feedback energy during the lift motoring, whereby saving the energy.
  • the present application proposes a device for automatically rescuing a lift and saving energy based on a super-capacitor module, which can provide the backup supply for emergency stopping-at-right-floor-level of lifts when power failure happens suddenly and implement the energy-saving operation of lifts.
  • the present application can further implement automatic storage of the backup energy for emergency stopping-at-right-floor-level of lifts and feedback energy from the traction motor during generating/braking in addition to automatic supply to the lift if the power from the power grid is available.
  • the present application can supply energy stored in the super-capacitor continuously to the lift for completing stopping-at-right-floor-level operation if the power failure happens suddenly.
  • Fig. 1 is a principle block diagram of a device for automatically rescuing a lift and saving energy according to an embodiment of the present application.
  • Fig. 2 illustrates a schematic structure of for automatically rescuing a lift and saving energy as shown in Fig. 1 .
  • the device for automatically rescuing a lift and saving energy of the present application is composed of an energy management system 6, a super-capacitor module 1, a DC-DC converter 2, a DC-AC inverter 3, and a switch circuit 4.
  • the device for automatically rescuing a lift and saving energy is connected with an external three-phase power grid 9 and a motor drive 8.
  • the device for automatically rescuing a lift and saving energy provides energy from the power grid 9 to the motor drive 8 to drive a traction motor 7 to operate normally if the power from the power grid is available, and provides the stored energy to the motor drive 8 to drive the traction motor 7 and the lift controller if the power from the power grid is unavailable, thereby rescuing the operation of the lift.
  • the energy management system 6 is a smart control center of the device of the present application and used to control the operations of automatically rescuing a lift and saving energy.
  • the energy management system 6 sends a control signal to the switch circuit 4 that selects the single-phase power in the three-phase power grid as the AC supply of the lift controller 10. At the same time, if the power from the power grid is available, the energy management system 6 further controls the DC-DC converter 2 to charge the super-capacitor module 1 to a specified backup energy for supplying power to the lift controller 10 and the traction motor 7 when the power from the power grid is unavailable.
  • the lift motion includes a down motion and an up motion.
  • the traction motor 7 operates in a braking mode, and in this case, the energy management system 6 controls the DC-DC converter 2 that transfers the feedback energy generated by the traction motor 7 during braking to the super-capacitor module 1.
  • the energy management system 6 controls the DC-DC converter 2 that supplies the absorbed feedback energy to the traction motor, thereby achieving the energy-saving operation of the lift.
  • the energy management system 6 controls the DC-AC inverter 3 that converts DC power, which comes from the stored energy in the super-capacitor module 1, into a single-phase AC power, and controls the switch circuit 4 that selects the single-phase AC power output from the DC-AC inverter 3 as the AC supply of the lift controller 10.
  • the energy management system 6 further controls the DC-DC converter 2 that passes the backup energy stored in the super-capacitor module 1 to the DC bus connected to the traction motor 8.
  • the energy management system 6 further sends a control signal to the lift controller 10 so that the lift is forced to automatically stop at the nearest floor, thus fulfilling the objective of automatic rescue after power failure.
  • the signal sent by the energy management system 6 to the lift controller 10 may be a voltage signal.
  • the voltage signal may be 12V or 24V, etc.; if the failure happens, the voltage signal may be zero Volta, depending on the interface requirement of the lift controller, and so on.
  • the device for automatically rescuing a lift and saving energy may further include a super-capacitor management system 5 which is used to monitor and manage operation of the super-capacitor module 1 and provides fault information to the energy management system 6.
  • the super-capacitor management system 5 measures and monitors the voltages across super-capacitor cells in the super-capacitor module 1 and the temperature of the different positions inside the super-capacitor module 1.
  • the super-capacitor management system 5 outputs the fault signals to the energy management system 6 if it finds any information on the over-voltage, the over-temperature, and the under-temperature.
  • FIG. 3 A circuit diagram of the super-capacitor module according to an embodiment of the present application is illustrated in Fig. 3 .
  • the super-capacitor module 1 is connected to the DC-DC converter 2, by which the backup energy for emergency stopping-at-right-floor-level of lifts and the feedback energy generated by the traction motor during braking are stored, and the backup energy is released for emergency stopping-at-right-floor-level of lifts and the feedback energy is released to the traction motor if the power failure happens suddenly.
  • the super-capacitor module 1 includes a plurality of super-capacitor cells and a plurality of balancing circuits connected in parallel with the super-capacitor cells.
  • the super-capacitor module 1 consists of m branches connected in parallel where m is an integer. Each branch consists of n units connected in series where n is an integer. Each unit consists of a super capacitor and a balancing circuit (BC), which are connected in parallel with each other.
  • the super-capacitor may be a super-capacitor cell or be composed of a number of super-capacitor cells connected in parallel.
  • Fig. 4 illustrates a schematic diagram of the balancing circuit (BC) in the super-capacitor module 1 according to an embodiment of the present application.
  • the BC includes resistors (R1, R2, R3, R4, R5, R6, R7, R8), a capacitor (C1), a three-terminal adjustable shunt regulator (Ul), a transistor (Q1), and a MOSFET (Q2).
  • Each component may be one or composed of a number of ones connected in series and/or in parallel.
  • the BC as shown in Fig. 4 is only exemplary and the present application is not limited to this.
  • the balancing circuit (BC) is used to maintain normal operation of a super capacitor connected in parallel with the BC.
  • the transistor (Q1) is conducted and then the MOSFET (Q2) is conducted, if the voltage across the super-capacitor cell is over a specified value. Consequently, the super-capacitor cell discharges to the resistor (R8) in order to reduce the voltage across the super-capacitor cell, thereby fulfilling the objective of protecting the voltage of the super-capacitor in an allowable value.
  • the balancing circuit (BC) is inactive if the voltage across the super-capacitor cell is less than the specified value.
  • Fig. 5 shows a schematic diagram of the DC-DC converter 2 according to an embodiment of the present application.
  • the DC-DC converter 2 is connected with the super-capacitor module 1, the motor drive 8 and the DC-AC inverter 3 and is controlled by the energy management system 6.
  • the DC-DC converter 2 is composed of inductors (L1 ⁇ LK), power switches (T1 ⁇ T2k), power diodes (D1 ⁇ D2k), a capacitor, a driving circuit, and a control circuit, where k is an integer, as shown in Fig. 5 .
  • the power switches may be switch components such as IGBTs, or MOSFETs, etc.
  • the present application is not limited to this.
  • the above DC-DC converter shown in Fig. 5 is only exemplary and the present application is not limited to this.
  • the DC-DC converter 2 receives the control signal from the energy management system 6 and is used to convert the voltage level of the super-capacitor module 1 into the voltage level of the DC bus in the motor drive 8 and vice versa. And, the DC-DC converter 2 may transfers the energy stored in the super-capacitor module 1 to the traction motor 7 via the DC bus, and may also store the feedback energy generated by the traction motor during braking into the super-capacitor module 1.
  • FIG. 6 A schematic circuit of the DC-AC inverter 3 according to an embodiment of the present application is illustrated in Fig. 6 .
  • the DC-AC inverter 3 is connected with the DC-DC converter 2, the motor drive 8, and the switch circuit 4 and controlled by the energy management system 6.
  • the DC-AC inverter 3 may be composed of power switches (T f1 , T f2 , T f3 , T f4 , such as IGBTs, MOSFETs, etc.), power diodes (D f1 , D f2 , D f3 , D f4 ), a filter inductor (L f ), a filter capacitor (C f ), a driving circuit, and a control circuit.
  • the above DC-AC inverter shown in Fig. 6 is only exemplary and the present application is not limited to this.
  • the DC-AC inverter 3 is controlled by the energy management system 6 and used to invert the DC bus power, which is transferred from the energy stored in the super-capacitor module 1 via the DC-DC converter 2, to the single-phase AC power. Then, the AC power is supplied to the lift controller via the switch circuit 4, thus controlling the lift to stop in emergency when the power failure happens suddenly.
  • FIG. 7 A schematic circuit diagram of the switch circuit 4 according to an embodiment of the present application is illustrated in Fig. 7 .
  • the switch circuit 4 is connected with the power grid 9 and the lift controller 10, and includes contactors or power switches (S1, S2) and a driving circuit.
  • the switch circuit 4 is controlled by the energy management system 6 and used to select one of two input AC sources depending on the control of the energy management system, in order to supply the lift controller. If the power from the power grid is available, the single-phase power from the three-phase grid is connected to the lift controller 10 as the single-phase AC power supply of the lift controller 10, and if the power failure happens suddenly, the output from the DC-AC inverter is selected to be connected to the lift controller 10 as the single-phase AC supply of the lift controller 10.
  • the method of automatically rescuing a lift and saving energy includes two situations, one of which is to store energy for rescuing the operation of the lift if the grid power is available, and the other of which is to use the stored energy as the backup power supply of a traction motor and as the power supply of a lift controller, if the grid power is unavailable, thus enabling the lift controller to control the operation of the lift and the emergency stopping of the lift at nearest floor.
  • the energy management system 6 controls the DC-DC converter 2 to charge the super-capacitor module 1 to a specified backup energy.
  • the energy management system 6 sends a control signal to the DC-DC converter 2 that transfers the feedback energy generated by the traction motor 7 during braking to the super-capacitor module 1.
  • the energy management system 6 sends a control signal to the DC-DC converter 2 that transfers the energy stored in the super-capacitor module to the DC bus for the traction motor.
  • the energy management system 6 immediately sends control signals to the DC-DC converter 2 and the switch circuit 4 so that the DC-DC converter 2 transfers the energy stored in the super-capacitor module 1 to the DC bus and the switch circuit 4 selects the AC output of the DC-AC inverter 3 as the AC supply of the lift controller, and at the same time, the energy management system 6 further sends a control signal to the lift controller 10 in order that the lift is forced to automatically stop at the nearest floor. If the energy management system 6 receives any fault signals from the super-capacitor management system 5 and the lift controller 10, the energy management system 6 may send control signals to the DC-DC converter 2 so that the DC-DC converter 2 is turned off. Alternatively, the energy management system 6 may send alarm information.
  • the energy management system 6 controls the DC-AC inverter 3 so as to stop the operation of the DC-AC inverter 3.
  • the energy management system 6 detects the voltage of the super-capacitor module 1 via the DC-DC converter so as to estimate the energy of the super-capacitor module 1.
  • the DC-DC converter is controlled to charge the super-capacitor module 1. Consequently, the DC power of the DC bus of the motor drive supplied by the three-phase grid is supplied to the super-capacitor module 1 via the DC-DC converter 2, so as to charge the super-capacitor module 1 to a specified backup energy. If the energy of the super-capacitor module 1 is not less than the rescue energy required for rescuing the operation of the lift, it shows that the energy stored in the super-capacitor module 1 is large enough to ensure the rescue energy to rescue the operation of the lift.
  • the rescue energy is a value for rescuing the operation of the lift which is determined according to the elevator capacity and power.
  • the traction motor When the lift moves down, that is, the traction motor operates in a braking mode, if the energy of the super-capacitor module 1 is less than an upper limit of the braking feedback energy, it shows that the super-capacitor module 1 may store energy and then the DC-DC converter is controlled to transfer the feedback energy of the DC bus generated by the traction motor during braking to the super-capacitor module 1 so as to store it.
  • the upper limit of the braking feedback energy represents the allowable maximum capacity of the super-capacitor module 1. If the energy of the super-capacitor module 1 is over the upper limit of the braking feedback energy, the feedback energy generated by the traction motor during braking is released via the DC bus.
  • the DC bus may release the feedback energy via a braking circuit (for example, as shown in Fig. 2 , a braking resistor is connected in series with a switch and then is connected with the DC bus, which are collectively referred as the braking circuit), so that the voltage across the DC bus is not over the upper limit thereof.
  • a braking circuit for example, as shown in Fig. 2 , a braking resistor is connected in series with a switch and then is connected with the DC bus, which are collectively referred as the braking circuit
  • the super-capacitor module 1 When the traction motor is in the motoring mode, on the premise of ensuring the energy of the super-capacitor module 1 is not less than the rescue energy, the super-capacitor module 1 transfers the redundant feedback energy to the DC bus, so as to supply the energy to the motor drive, thereby saving energy. Consequently, before supplying the feedback energy to the motor drive, it is firstly determined whether the energy of the super-capacitor module 1 is larger than the required rescue energy. If the energy of the super-capacitor module 1 is larger than the required rescue energy, it is determined to transfer the feedback energy in the super-capacitor module 1 to the DC bus of the motor drive via the DC-DC converter.
  • the DC-DC converter is controlled to stop and thus the feedback energy is not transferred.
  • the energy management system 6 selects the energy stored in the super-capacitor module 1 as the rescue energy of the traction motor and the lift controller. At the same time, the energy management system 6 sends a control signal to the DC-DC converter 2 that transfers the energy stored in the super-capacitor module 1 to the DC bus, and the DC-AC inverter 3 begins to operate. Then, the energy management system 6 sends an instruction to the switch circuit 4 that selects the output from the DC-AC inverter 3 as the AC supply of the lift controller 10, and at the same time, sends a control signal to the lift controller 10, thereby forcing the lift to stop emergently at the nearest floor.
  • the present application provides the stable and reliable power supply for rescuing lifts by using the super-capacitor module when the power failure happens suddenly, stores the feedback energy generated during the lift braking, and reuses the feedback energy during the lift motoring, whereby saving the energy.

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  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Power Engineering (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Elevator Control (AREA)
  • Maintenance And Inspection Apparatuses For Elevators (AREA)
  • Inverter Devices (AREA)
EP15781010.2A 2015-08-07 2015-09-10 Automatische rettungs- und energiesparvorrichtung für aufzug und steuerungsverfahren dafür sowie superkondensatormodul Withdrawn EP3156358A4 (de)

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CN201510484927.1A CN105098967B (zh) 2015-08-07 2015-08-07 电梯自动解救及节能装置以及其控制方法、以及超级电容器模块
CN201520595650.5U CN204928347U (zh) 2015-08-07 2015-08-07 电梯自动解救及节能装置、以及超级电容器模块
PCT/CN2015/089365 WO2017024653A1 (zh) 2015-08-07 2015-09-10 电梯自动解救及节能装置以及其控制方法、以及超级电容器模块

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US11053096B2 (en) 2017-08-28 2021-07-06 Otis Elevator Company Automatic rescue and charging system for elevator drive
CN108545564A (zh) * 2018-04-19 2018-09-18 上海新时达电气股份有限公司 一种电梯物联网设备
CN108545564B (zh) * 2018-04-19 2019-07-30 上海新时达电气股份有限公司 一种电梯物联网设备
US11472668B2 (en) 2018-11-14 2022-10-18 Otis Elevator Company Elevator alarm systems
WO2020239260A1 (de) * 2019-05-29 2020-12-03 Sew-Eurodrive Gmbh & Co. Kg Antriebssystem und verfahren zum betreiben eines antriebssystems

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WO2017024653A1 (zh) 2017-02-16
TWI636945B (zh) 2018-10-01
KR20170028239A (ko) 2017-03-13
EP3156358A4 (de) 2017-12-13
KR101930252B1 (ko) 2018-12-18
US20180229968A1 (en) 2018-08-16
US11046553B2 (en) 2021-06-29

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